Dumping- scow



H. T. DUNBAH. DUIVIPING SCOW.

APPLICATION F |LED MAY 13, 192|.

Patented Jan. 10, 1922@ 2 SHEETS-SHEET l.

In verz 7W* H. T. DUNBAR. DUMPING SCOW.

APPLICATION FILED MAY13. 1921..

Patented Jan. 10, 1922.

` 2 SHEETS-SHEET`2.

CIK

DUMPNG SCOW.

,with

Application led May 13,

To all lwlw/m, it may concern:

lle it known that l, Hansis T. DUNBAR, a citizen of the United States, residing in Buffalo, in the county of Erie and State of lew York, have invented new and useful improvements in Dumping Scows, of which the following is a specification.

T his invention relates to a dumping scow and more particularly to a scow of this character which provided with hollow swinging doors for controlling the lower or outletf ends of the wells or pockets in the hullof the sconn f l i i rl`hc purpose of this invention isto provide simple and reliable means for practically oiliecting self-hailing of the hollow doors in the event that any water leaks into the saune by utilizing the swinging movement of the doors which is imparted to the saine in one direction by the weight of the materialV when the saine is dumped and in the opposite direction by the weight of the door as the same returns to its normal closed position by gravity, thereby avoiding the necessity of manual labor or separate pumping means for accomplishing this purpose. ln the accompanying drawings: Figure 1 is a vertical longitudinal section of a scow equipped with my invention. Figure 2 is a top plan view thereof, partly in section.

l? 3 is a section on the line 3-3 of Figg l. Figures el, and 5 are enlarged sections of the well and door showing the method of operation. Figure G is a sectional detail of the door stop device.

Similar characters of reference refer to like parts throughout the several views.

The hull of this scow is preferably hollow and provided with a flat bottom 10, a flat deck 1l and upright side walls connecting the edges of the bottom and deck and having the main central parts 12 thereof arranged lengthwise while the opposite end portions 13 thereof are inclined toward the longitudinal center of the hull so that the opposite ends ofthe latter are tapered or pointedforwardly, but present vertical edges 14- at the extreme ends of the hull.

rlhis hull may be provided with one or more wells 9 extending from the deck to the bottom thereof, two of such wells being shown., for example, in thedrawings and each well being designed to form part of a receptacle for vcarrying the material which is to be transported by the scow. Each of these wells is provided with two longitudi Specification of Letters Patent.

' Patentedflan. 310, 1922.

1921. Serial No. 469,344.

nal side walls 15 which are arranged parallel with each other and two transverse walls 16 and 17 which diverge downwardly from the top or deck of the hull toward the bottom of the same, the transverse wall 16 being preferably curved while the other transverse wall 17 is preferably straight, as shown in `F ig. l. When twowells are einployed in the hull the straight inclined transverse walls of both wells preferably are arranged on the inner sides of the wells or away from the ends of the hull and are joined at their upper ends so asto form an apex 18 whereby any material dropped upon `the central part ofthe scow will be dividedy `by this apex and caused to flow downwardly partly into eachone ofthe wells.

In the case of two wells being arranged lengthwise next tol each other in the hull the curved transverse walls 16 are arranged next to the ends of the hull.

The lower or outlet end of each well is controlled by a closure which is moved `into a position across this outlet so as to form with the well a pocket or receptacle which re ceives the load to be transported and this closure is movable out of a position across this outlet, so as 4to permit the load to be discharged fromthis pocket when the material has been transported to the place where the same is to be discharged. ln its preferred form this closure consists of a door which is capable of swinging vertically into and out of its operative position, but at no time extends below the Ybottom of the hull, this being accomplished by arranging the axis `of the door above the well and causing the door, when opening, to swing upwardly with reference to the lower end of the well. ln the preferred construction of this door the saine is made hollow and comprises end heads 190, an upper flat wall 19 and a lower curved wall 2() which connects at its several edges Vwith the corresponding edges of the `front wall 19 and the heads 190 and forms therewith a buoyant body, the upwardly V'being permissible for l presently appear.

transversevwall 16, as. shown in Fig. 1, this ,reasons which will 4Vwall 20 of each dooris concentric with the axis of the trunnions 22 and the curved transverse wall 16 of the respective well is also preferably concentric with the trunnions, as shown in F ig. 1, which causes the lower wall of the door to always travel fairly close to thestra'ight transverse wall 17 but remain clear of or spaced apart from the curved wall 16.

The upward movement of each door on that side of the well having the curved transverse wall 17 is limited by a stop de-,

vice while the scow is being loaded and while the load is being transported, but this stop device may be shifted to permit the door to continue its upward movement on that side ofthe well having the curved wall 16 when it is desired to uncover or open the lower end of the wall and permit the load to be discharged therefrom by gravity. This stop device may be variously'constructed, but in its preferred form, the same isjconstructed in the form of a toggle which pro-V jects into the path of the door and prevents the same from effecting its opening movement, but can be easily actuated for releasing the door so that the door can be opened automatically by the combined effeet of the 'weight of material on the door and the buoyant effect of the water on the door. In its preferred form this stop Vdevice comprises an outer or rear toggle link 24 which is pivoted on the deck of theV hull adjacent to the central part of the-curved transverse wall 16 thereof, so that the same is capable of swinging in a'vertical plane,

and an outer or front toggle link 25 whichy is pivotally connected with the inner link 24 so as to be capable'of swinging in Va vertical plane relatively thereto. Then the scow is emptied, each of the doors is moved by gravity into a position in which it closes the lower or outlet end of its well in which position the upper wall 19 of the door is horizontal, or substantially so, as shown by full lines in Fig; 5. When loading this scow the material is dropped into the wells so that the greater part ofV the same rests upon the horizontal wall 19 of each door and the adjacent straight inclined wall 17 of the respective well, while a comparatively small part ofthe load Vis arranged on that part thereby causing the weight of the material in each well to turn eachdoor, so that that end thereof next to the inclined wall 17 would be lowest and that end next to theV curved wall 16 will beelevated, the movement in this direction being, however, arrested before the well is uncovered at its lower end by engagement of the elevated end of the door with the front end of outer toggle link which at this time is shifted so as to project into the path of the door. The two toggle links are held at this time in a position in which they are practically rigid by engagement of the inner toggle link with the adjacent part of the curved transverse wall 16 of the respect-ive well, so that the point of engagement between the door and the outer toggle link and lthe pivotal connections between the inner toggle link and the hull and outer toggle link are on a dead center and remain rigid under the thrust exerted against the same by the door which tends to move forwardly at the respective end by the preponderating pressure ofthe load bearing against the opposite end thereof.

When it is desired to dump the material from one of the wells, the attendant disengages the toggle stop device from the respective door and swings the same vertically out of the path thereof and against thc deckof Vthe hull. W'hen this is done, the door is immediately turned into an opened position, so that the same uncovers the lower or outlet end of the well, this opening movement" of the door being automatic and effected by the preponderating weight of the material resting upon the upper floor 19 thereof'between the axis of the door and the straight transverse wall 17 of the well, which movement is aided by the buoyancy of the door, due to its hollow construction. As the door rises on that side next -to the curved wall 16 the upper wall 19 of the door assumes a gradually increasing inclination while at thesame time the material slides down the inclined transverse wall 17, whereby the entire load is discharged from the well through the lower end or outlet thereof. As soon as the material has slid off from the door,-the same again returns by gravity into its lower position in which it extends across the outlet of the well, and then the operator again shifts theV locking device from the top of the deck into a position in which it stands in the path of that edge of the door next to the curved wall 16 ready to arrest the upward movement thereof and keep the door in its closed position, when a load of material is deposited in the wall.

In order to permit the load to discharge promptly from the well and the door to clear itself effectively Vof the material deposited upon the upper wall 19 thereof, the transverse edge 26 of the well at the lower end of the straightl wall l? is arranged iiarther from a vertical plane extending through the axis of the door and the transverse edge 2T of the well at the lower end of the curved wall 16, as shown in Fig. l. As soon as that end of the Hoor next tothe straight wall 17 passes beyond the lower edge 2G thereof the material immediately begins to discharge from the well, which discharge` is gradually accelerated asv the door continues to swing vertically in the same direction. In order to still further facilitate the discharge of the material from the well and avoid any clogging action, that part of the' outlet of the well below thetransverse edge 26 is undercut, as shown at 2S, whereby any material after passing below the edge 26 will be immediately -fully liberated und permitted to drop out of the well without any restriction.

ln order to increase the loading capacity of the scow and to protect the bearings on the declr which support the pivots of the doors, two coainings 29 are arranged lengthwise upon the decir along opposite sides of the wells so as to enclose the inner parts of the bearings of the doors, thereby preventing the bucket of the dredging apparatus, as the same swings over the scow, from injuring these bearings. As shown in the drawings, the several walls or parts of the hull forming the shell of the same and the main parts of the doors are constructed of sheet metal, but it is to be understood that these parts may be constructed of other materials, if desired.

inasmuch as it is practically impossible to exclude bilge water from the interior of each door due to injury of its walls and loosening of the joints or seams between the several plates forming the hollow body of the door, means are provided for utilizing the weight of the material deposited in the wells and upon the doors as the means for furnishing the power whereby the water is bailed out of the hollow doors when this is desired or required.

The preferred means for this purpose shown in the drawings are constructed as follows:

BO represents an upright baille plate projecting upwardly from the lower wall 2O of each door adjacent to that transverse edge thereof opposite to that which is engaged by the stop device and terminating short of the top wall i9, as shown in Figs. l, i and 5, and extending the full width of the door, as shown in Fig. 3.

3l represents a substantially horizontal bottom 'plate extending outwardly from the upright baille plate below the upper edge thereof to the adjacent walls of the door and forming with the same a trap chamber 32.

higher than the trap chamber.

33 represen s a drain pipe or conduit eX- tending from the trap chamber to the eX- terior of the door at a point below the trap chamber and providedr with a. manually operable valve 34 for controlling the same.

This pipe preferably entends at its upper end-through the upper part of the baille plate into the trap chamber whilcits lower end extends throughthe lower wall of the door to the underside of the same. rlwo of these drain pipes are preferably employed at opposite longitudinal ends of the door and the valve of each pipe is operated by a rotatable shaft or rod extending upwardlj;y at an angle through the adjacent arm of the door lengthwise of the door and connecter at its lower end with the stem of the valve while its other end is provided with han die 35 above the respective door arm and adjacent to that transverse end of the door opposite to the trap chamber.

lllhen the door is closed and horizontal while the well is empty and also when in its closedand tilted position while the well` is filled with material, any water leaking through the door will gather in the lower part of the main collecting chamber 36 within the door below the trap chamber, Vas shown in Figs. l and 5.

As the door is turned vertically in the direction of the arrow in Fig. 4i for uncovering the lower end of the well and discharging the load therefrom, the transverse edge of the door opposite the trap chamber rises relative to the trap chamber and the latter is tilted, as shown in Fig. 4f, thereby causing any water which has accumulated in the collecting chamber to flow from the latter into the trap chamber. While the scow is loaded, the valves 34C are closed so that no water can flow through the same into the trap chamber and the interior of the door due to the water level at this time being After the scow has been unloaded the trap chamber of each door is arranged above the water level so that upon now opening the valves 34 by means of the handles 35 the water caught in the trap chamber will flow therefrom to the exterior of the door and when the trap chamber is empty the valves are again closed until the next hailing operation.

lt will be apparent from the foregoing that the hollow doors of the scow can by this means be hailed mainly by power derived initially from the weight of the material which is loaded into the scow and that the only manual operation required is that of opening and closing the valves 34, thereby permitting of frequent hailing of the scow without any expense as would be entailed if pumps were employed, as has been the custom heretofore for this type of water craft.

I claim as my invention:

l. A dumping scow comprising a hull having` a well extending from the top to the bottom thereof, ahollow door adapted to move vertically into and out of a position across the lower end Vof said well, and means for removing water from the interior 01"*` said door vby utilizing the movement of the door. l

2. A dumping scow comprising a hull having a well extending from the top to the bottom thereof, a hollow door adapted to move vertically into and Vout oa position across the lower end of said well, and means `for removing water from. the interior of said doorV by the vertical movement of the same during the operation of opening and closing said door.

8. A dumping scow comprisinga hull having a well extending from the top to the bottom thereof, a hollow door adapted to move vertically into and out of a position across the lower end of said well, and means for removing water from the interior of said door by thevertical movement of 'tl e same during the operation of opening and closing said door and comprising a trap elevated above the lower wall of said door and a valved duct leading from said trap to the exterior of the door.

4c. A dumping scow comprising a hull having a well extending from the top to the bottom thereof, a hollow door adapted to move vertically into and out of a position across the lowerrend of said well, and means for removing water from the interior of said door by the vertical movement of the same during the operation of opening and closing said door and comprising` a trap elevated above the lower wall of said dooiI adjacent to one of the transverseredges oi' the door, and a' valved duct leading from said trap to the exterior of the door.

5. A dumping scow comprising a hull having a well extending from the top to the bottom thereof, a hollow door for controlling the outlet of said well at the lower end thereof and having a iiat upper wall and downwardlyrcurved lower wall, and means for removing water from the interior of the door comprising a trap which is ele vated above the lower wall of said door and arranged adjacent to one transverse end thereof, a drain pipe leading from said trap' to the exterior of said door at a point below said trap, and a valve arranged in said pipe and manually operable from the exterior ol" the door.

' HARRIS T. Donnas.. 

